Composite enclosure device for deep foundation pit

Abstract

The utility model discloses a deep foundation pit composite enclosure device which comprises a deep foundation pit supporting system, the deep foundation pit supporting system comprises a plurality of secant piles which are sequentially connected end to end to form a plurality of groups of row piles, and the adjacent corners of the plurality of groups of row piles jointly define a water stop enclosure face through corner piles. A supporting assembly is connected to the inner side wall of the water stop enclosure face in an abutting mode, a foundation pit support is formed through combination of the secant piles and the supporting assembly, and the stability and strength of the foundation pit support are enhanced while underground water or side water is prevented from entering a foundation pit.

Description

Technical Field

[0001] The utility model relates to a composite enclosure device for a deep foundation pit. Background Art

[0002] The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. After the foundation pit is excavated, in order to prevent the side walls of the foundation pit from collapsing, the foundation pit needs to be supported to improve the stability of the foundation pit and protect the life safety of the workers in the foundation pit. For example, the patent application number is 201810070241.1, and its name is a foundation pit support structure, comprising a plurality of support components arranged along the side walls of the foundation pit, the support components comprising a base plate fixed to the bottom of the foundation pit, a guard plate for supporting the side walls of the foundation pit, and a support component connecting the base plate and the guard plate. The guard plates have slots on both sides along the height direction, and connecting baffles with edges on both sides respectively inserted into the slots are provided between adjacent guard plates. The connecting baffles are also provided with a fixed countersunk hole on the side away from the side walls of the foundation pit, and a support rod is installed in the fixed countersunk hole to press the connecting baffle against the side walls of the foundation pit and insert into the side walls of the foundation pit. Although the foundation pit support structure is relatively easy to install and disassemble in the foundation pit, it is not effective in water stopping, stability and strength of the foundation pit support, and the above-mentioned foundation pit support is not suitable for deep foundation pits. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a deep foundation pit composite retaining device, which forms a foundation pit support through the combination of interlocking piles and support components, thereby preventing groundwater or side water from entering the foundation pit while enhancing the stability and strength of the foundation pit support.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite retaining device for a deep foundation pit, including a deep foundation pit support system, wherein the deep foundation pit support system includes a plurality of interlocking piles connected end to end in sequence to form a plurality of groups of pile rows, and the plurality of groups of pile rows are jointly enclosed at adjacent corners by corner piles to form a water-stop retaining surface, and the inner wall of the water-stop retaining surface is abutted against a support assembly.

[0005] Furthermore, the interlocking pile includes two plain piles and a first concrete pile interlocking with the two plain piles, the two plain piles are cast by multiple sections of first casing with the same length to form a pile body with an interlocking notch, and the interlocking notch is provided with a T-shaped groove, the first concrete pile is cast by multiple sections of second casing to form a pile body with a T-shaped block, a first steel cage is provided in the first concrete column, and a first waterstop steel plate is welded to the first steel cage corresponding to the T-shaped block.

[0006] Furthermore, the pile bodies adjacent to the left and right of the corner pile are both plain piles, and the corner pile is a steel sheet pile. The end face of the steel sheet pile facing the foundation pit is arc-shaped and guide blocks are provided at the T-slots corresponding to the two ends of the arc, and the bottom of the steel sheet pile has a pointed cone.

[0007] Furthermore, the pile bodies adjacent to the left and right of the corner pile are both plain piles, the corner pile is a second concrete pile, the second concrete pile is provided with a connecting block corresponding to the T-slot, a second steel cage is provided in the second concrete pile, and a second waterstop steel plate is welded to the connecting block corresponding to the second steel cage.

[0008] Furthermore, the support assembly includes multiple groups of corner support beams arranged at the corners and cross beams connecting adjacent corner support beams, abutments are arranged between the corner support beams and the cross beams, multiple groups of anchors are arranged on the cross beams, one end of the anchor obliquely penetrates the bite pile and is fixed in the soil, and the other end is fixed on the cross beam.

[0009] Furthermore, the fastening member includes a column, the bottom of which is fixed to the bottom of the foundation pit by a vertical anchor rod, and a plurality of articulated telescopic support rods are vertically distributed on the column corresponding to the corner support beam, and the ends of the articulated telescopic support rods are connected to the cross beam and the corner support beam by screws.

[0010] Furthermore, the side of the corner support beam facing the water-stop enclosure surface corresponding to the side of the pile row is a continuous and uninterrupted semicircular arc.

[0011] Beneficial effects:

[0012] 1. Multiple groups of piles are formed by connecting multiple interlocking piles end to end. The adjacent corners of multiple groups of piles are enclosed by corner piles to form a water-stop retaining surface to prevent groundwater or side water from entering the foundation pit. Support components are set up on the inner end face of the water-stop retaining surface to increase the stability and strength of the foundation pit support.

[0013] 2. The first casing is cast to form a plain pile with an interlocking notch, which reduces the number of pile cutting steps and reduces material waste. The interlocking notch is also provided with a T-slot, which guides the lowering of the second casing and the steel cage and improves the verticality of the first concrete pile. The first concrete pile is cast through the second casing to form a pile body with a T-block. The T-block and the T-slot strengthen the connectivity and strength of the pile body, and a water-stopping steel plate is provided to further enhance the water-stopping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of a composite enclosure device for a deep foundation pit according to Embodiment 1;

[0015] Figure 2 It is a schematic diagram of the occlusal pile;

[0016] Figure 3 This is a schematic diagram of a steel sheet pile;

[0017] Figure 4 It is a top view of the deep foundation pit composite retaining device of Example 2.

[0018] Figure numerals: 1. interlocking pile; 11. plain pile; 12. first concrete pile; 13. interlocking notch; 14. T-slot; 15. first steel cage; 16. T-block; 17. first water-stop steel plate; 2. row of piles; 3. corner pile; 4. water-stop enclosure; 5. support assembly; 51. corner support beam; 52. cross beam; 53. fastening member; 531. column; 532. hinged telescopic support rod; 54. anchor; 6. steel sheet pile; 61. guide block; 62. pointed cone; 7. second concrete pile; 71. connecting block; 72. second steel cage; 73. second water-stop steel plate. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] Refer to Figure 1-Figure 3 As shown, the first embodiment of the utility model provides a deep foundation pit composite enclosure device, including a deep foundation pit support system, the deep foundation pit support system includes a plurality of interlocking piles 1 connected end to end in sequence to form a plurality of pile rows 2, the plurality of pile rows 2 are enclosed together at adjacent corners by corner piles 3 to form a water-stop enclosure surface 4, the inner side wall of the water-stop enclosure surface 4 is abutted with a support assembly 5, the support assembly 5 includes a plurality of corner support beams 51 arranged at the corners and a cross beam 52 connected between adjacent corner support beams 51, a fastening member 53 is arranged between the corner support beam 51 and the cross beam 52, A plurality of anchors 54 are provided on the cross beam 52, one end of the anchor 54 obliquely penetrates the bite pile 1 and is fixed in the soil, and the other end is fixed on the cross beam 52. The fastening member 53 includes a column 531, and the bottom of the column 531 is fixed to the bottom of the foundation pit by a vertical anchor rod. A plurality of hinged telescopic support rods 532 are vertically distributed on the column 531 corresponding to the corner support beam 51, and the hinged telescopic support rod 532 includes a first section and a second section, and the first section and the second section are both provided with through holes at intervals, and the second section is slid along the first section to adjust the corresponding length and then fixed by bolts. The end of the first hinged telescopic support rod 532 is connected to the cross beam 52 and the corner support beam 51 by screws, and the corner support beam 51 forms a continuous and uninterrupted semicircular arc corresponding to the side of the pile row 2 facing the side of the water-stop retaining surface 4, ensuring the fit between the corner support beam 51 and the pile row 2, and the water-stop retaining surface 4 is formed by the interlocking piles 1 to prevent groundwater or side water from entering the foundation pit, and the support assembly 5 is erected on the inner end face of the water-stop retaining surface 4 to increase the stability and strength of the foundation pit support.

[0021] Refer to Figure 2As shown, the reinforced interlocking pile 1 includes two plain piles 11 and a first concrete column interlocked with the two groups of plain piles 11. The two plain piles 11 are connected by multiple sections of first sleeves of the same length and corresponding lengths to form a pile body with an interlocking notch 13, and the interlocking notch 13 is provided with a T-shaped groove 14. The first concrete pile 12 is connected by multiple sections of second sleeves of the same length and corresponding lengths to form a body with a T-shaped block 16. Through the prefabrication of the first sleeve and the second sleeve, the interlocking notch 13 is opened in the first sleeve, which reduces the steps of pile cutting and also reduces the waste of materials. The interlocking notch 13 is provided with a T-shaped groove 14, which guides the lowering of the steel cage and improves the verticality of the cast pile body. When the first concrete pile 12 is cast after the plain pile 11 is cast, the second sleeve is used to cast the first concrete pile 12 through the T-slot 14 and the T-block 16, ensuring that the first concrete pile 12 is in contact with the bite notch 13 when casting, thereby strengthening the connection strength and connectivity between the plain pile 11 and the first concrete pile 12. A first steel cage 15 is provided in the first concrete pile 12, and a first water-stopping steel plate 17 is welded to the first steel cage 15 corresponding to the T-block 16 to strengthen the water-stopping effect at the bite.

[0022] Refer to Figure 3 As shown, the pile bodies adjacent to the left and right of the corner pile 3 are both plain piles 11, and the corner pile 3 is a steel sheet pile 6. The end face of the steel sheet pile 6 facing the foundation pit is arc-shaped and guide blocks 61 are provided at both ends of the arc corresponding to the T-slots 14. The bottom of the steel sheet pile 6 has a pointed cone 62 for easy insertion into the soil.

[0023] Refer to Figure 4 As shown, the second embodiment is basically the same as the above-mentioned first embodiment, and the only difference is that a second concrete pile 7 is used as the corner pile 3, a connecting block 71 is provided corresponding to the T-slot 14, a second steel cage 72 is provided inside, and a second waterstop steel plate 73 is welded to the second steel cage 72 corresponding to the connecting block 71, both of which are for enhancing the waterstop effect at the corner.

[0024] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A composite enclosure device for a deep foundation pit, comprising a deep foundation pit support system, characterized in that: The deep foundation pit support system comprises a plurality of interlocking piles (1) connected end to end in sequence to form a plurality of groups of pile rows (2); the plurality of groups of pile rows (2) are enclosed at adjacent corners by corner piles (3) to form a water-stop enclosure surface (4); the inner side wall of the water-stop enclosure surface (4) is abutted against a support assembly (5).

2. The deep foundation pit composite enclosure device according to claim 1 is characterized in that: The interlocking pile (1) comprises two plain piles (11) and a first concrete pile (12) interlocked with the two groups of plain piles (11); the two plain piles (11) are cast by a plurality of first sleeves of the same length to form a pile body having an interlocking notch (13), and the interlocking notch (13) is provided with a T-shaped groove (14); the first concrete pile (12) is cast by a plurality of second sleeves of the same length to form a pile body having a T-shaped block (16); a first steel cage (15) is provided inside the first concrete pile (12), and a first water stop steel plate (17) is welded to the first steel cage (15) corresponding to the T-shaped block (16).

3. The deep foundation pit composite enclosure device according to claim 2 is characterized in that: The pile bodies adjacent to the corner pile (3) on the left and right are both plain piles (11), and the corner pile (3) is a steel sheet pile (6). The end face of the steel sheet pile (6) facing the foundation pit is arc-shaped and guide blocks (61) are provided at both ends of the arc corresponding to the T-shaped grooves (14), and the bottom of the steel sheet pile (6) has a pointed cone (62).

4. The deep foundation pit composite enclosure device according to claim 2 is characterized in that: The pile bodies adjacent to the left and right of the corner pile (3) are both plain piles (11); the corner pile (3) is a second concrete pile (7); a connecting block (71) is provided in the second concrete pile (7) corresponding to the T-slot (14); a second steel cage (72) is provided in the second concrete pile (7); and a second water-stopping steel plate (73) is welded to the second steel cage (72) corresponding to the connecting block (71).

5. The deep foundation pit composite enclosure device according to claim 3 or 4, characterized in that: The support assembly (5) comprises a plurality of groups of corner support beams (51) arranged at the corners and cross beams (52) connecting adjacent corner support beams (51); a fastening member (53) is arranged between the corner support beams (51) and the cross beams (52); a plurality of groups of anchor members (54) are arranged on the cross beams (52); one end of the anchor member (54) obliquely penetrates the bite pile (1) and is fixed in the soil, and the other end is fixed on the cross beam (52).

6. The deep foundation pit composite enclosure device according to claim 5 is characterized in that: The fastening member (53) comprises a column (531), the bottom of the column (531) is fixed to the bottom of the foundation pit via a vertical anchor rod, a plurality of hinged telescopic support rods (532) are vertically distributed on the column (531) corresponding to the corner support beam (51), and the ends of the hinged telescopic support rods (532) are connected to the cross beam (52) and the corner support beam (51) via screws.

7. The deep foundation pit composite enclosure device according to claim 6 is characterized in that: The side of the corner support beam (51) facing the water-stop enclosure surface (4) corresponds to the side of the pile row (2) and is in a continuous and uninterrupted semicircular arc.

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